2012
DOI: 10.1073/pnas.1214130109
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On the strength of glasses

Abstract: The remarkable strength of glasses is examined using the random first order transition theory of the glass transition. The theory predicts that strength depends on elastic modulus but also on the configurational energy frozen in when the glass is prepared. The stress catalysis of cooperative rearrangements of the type responsible for the supercooled liquid's high viscosity account quantitatively for the measured strength of a range of metallic glasses, silica, and a polymer glass.elasticity | elastic shear mod… Show more

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Cited by 69 publications
(79 citation statements)
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“…An additional factor κ is needed to account for additional strain energy relieved by harmonically distorting the surrounding region of a region once that region becomes stress-free (35). As discussed by Wisitsorasak and Wolynes (20), this factor is analogous to the energy cost of distorting an inclusion in a solid body as calculated by Mackenzie (35). The κ is given in terms of Poisson's ratio ν as κ = 3 − 6/(7 − 5ν).…”
Section: Theoretical Frameworkmentioning
confidence: 99%
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“…An additional factor κ is needed to account for additional strain energy relieved by harmonically distorting the surrounding region of a region once that region becomes stress-free (35). As discussed by Wisitsorasak and Wolynes (20), this factor is analogous to the energy cost of distorting an inclusion in a solid body as calculated by Mackenzie (35). The κ is given in terms of Poisson's ratio ν as κ = 3 − 6/(7 − 5ν).…”
Section: Theoretical Frameworkmentioning
confidence: 99%
“…This relief of strain energy lowers the activation free-energy barrier. If the applied stress is large enough, the free-energy barrier will vanish, leading to the limiting strength of the glass typically near half the Frenkel limit (20).…”
Section: Theoretical Frameworkmentioning
confidence: 99%
See 1 more Smart Citation
“…Plastic flow and mechanical relaxation Random First-Order Phase Transition Theory [46,66] A glassy structure is dynamically heterogeneous, consisting of regions of different relaxation times To quantitatively understand anelasticity in MGs, Liu and Yang recently proposed a 'coreeshell' structural model [17,57,75e79] based on a similar physical picture that MGs comprise the nanoscale liquid-like regions trapped within an elastic glassy matrix. The 'core' region may be interpreted as the group of atoms exhibiting a lower packing density, a lower local modulus or a higher energy dissipation rate than those in the 'shell' region.…”
Section: Plastic Flowmentioning
confidence: 99%
“…However, the physical separation of dried liposomes by bulky sucrose glass could be an important factor in preventing liposome in the glassy state (Simperler et al, 2006), because dynamic properties of the glassy state depend on high viscosity, which lowers the mobility of molecules (Wisitsorasak andWolynes 2012), Ojovan 2008), and the physical separation of dried lipospmes could certainly inhibit the collapse membrane in the glass state (Ekdawj-Sever et al 2001).…”
Section: Sem Study Of Dried Liposomes In the Presence Of Hpmc Matrixmentioning
confidence: 99%